Whenever people or goods are moved from one place to another, transportation workers load it, haul it, tow it, truck it, fuel it, service it, and keep it rolling. Towboat deckhands don work vests and prepare the rigging for a midnight turn of grain and coal-filled barges coming up-river from Cairo bound for St. Louis; air traffic controllers carefully plot alpha-numeric readouts of traffic above D.C.'s National Airport; the yard engine at a midwest classification yard "shoves" a train of boxcars toward the hump as a brakeman cuts cars bound for several eastern destinations; a commissary cook fries sixty steaks for a flight from Kansas City ...